EP3288806B1 - Système de contrôle et action d'émergence pour un frein de véhicule ferroviaire - Google Patents

Système de contrôle et action d'émergence pour un frein de véhicule ferroviaire Download PDF

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Publication number
EP3288806B1
EP3288806B1 EP15721969.2A EP15721969A EP3288806B1 EP 3288806 B1 EP3288806 B1 EP 3288806B1 EP 15721969 A EP15721969 A EP 15721969A EP 3288806 B1 EP3288806 B1 EP 3288806B1
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European Patent Office
Prior art keywords
train
brake
brake power
actual
power
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EP15721969.2A
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German (de)
English (en)
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EP3288806A1 (fr
Inventor
Eric C. Wright
Jason CONNEL
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New York Air Brake LLC
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New York Air Brake LLC
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/18—Safety devices; Monitoring
    • B60T17/22—Devices for monitoring or checking brake systems; Signal devices
    • B60T17/228—Devices for monitoring or checking brake systems; Signal devices for railway vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/17—Using electrical or electronic regulation means to control braking
    • B60T8/1701—Braking or traction control means specially adapted for particular types of vehicles
    • B60T8/1705—Braking or traction control means specially adapted for particular types of vehicles for rail vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T2270/00—Further aspects of brake control systems not otherwise provided for
    • B60T2270/40—Failsafe aspects of brake control systems
    • B60T2270/402—Back-up
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T2270/00—Further aspects of brake control systems not otherwise provided for
    • B60T2270/40—Failsafe aspects of brake control systems
    • B60T2270/406—Test-mode; Self-diagnosis

Definitions

  • the present invention relates to train braking systems and, more particularly, to a system for monitoring and addressing the actual power of a train braking system.
  • the present invention relates further to a method of providing train brake safety. Such system and method are known from US 5744707 A .
  • the braking power of a train is typically the subject of strict government requirements that are designed to ensure the safe operation of trains.
  • the Federal Rail Administration has issued complex and burdensome rules governing train braking.
  • the FRA rules require that one hundred percent of the brakes on a train shall be effective and operative brakes prior to use or departure from certain locations.
  • the train shall not move if less than 85 percent of the cars in a train have effective and operative brakes.
  • the failure of the actual braking power of the train to exceed certain thresholds requires the train to be taken out of the service.
  • the FRA rules also require that a train must be stopped at a qualified location every 1000 miles, more or less, depending on numerous factors, including if cars are added or removed from the train.
  • the terminal test is burdensome as it requires the train to be sided at an approved rail yard for the test and inspection and those rail yards are often congested with other trains to be tested, trains being made up, and cars being transferred from one train to another.
  • the terminal test is lengthy and can only be done by certain qualified personnel. While advances in the art, such as electronically controlled pneumatic (ECP) brakes have resulted in more relaxed rule in light of the ability of ECP systems to provide some feedback on brake system and even stop a train whose brake function has declined, these systems do not determine the actual effectiveness of the braking system. Accordingly, there is a need in the art for a system that can accurately determine the actual power of the braking system of the train to ensure that the train is being operated within safe margins without the need for burdensome testing.
  • ECP electronically controlled pneumatic
  • the present invention comprises a train brake safety system for improving train braking safety that includes an actual brake power module programmed to calculate the actual brake power exhibited by a train during operation of the train and a brake efficiency module programmed to determine whether the actual brake power exhibited by the train has fallen below a safe brake power threshold.
  • An expected brake power module may be used to calculate the theoretical brake power of the train.
  • the invention further comprises a response module that initiates one or more actions in response to the actual brake power falling below the safe brake power threshold. Responsive actions may include stopping the train or sending a command to the brake control system to cause a predetermined or proportional increase in the brake pipe set pressure in response to the actual brake power falling below the safe brake power threshold.
  • the safe brake threshold can comprise a percentage of the theoretical expected brake power for the train or the maximum actual brake power of the train as determined by one or more tests performed with the braking system in 100 percent working condition.
  • the safe brake threshold may adjusted according to at least adjustment factor to account for the particular terrain of the route to be traversed by the train, the geographic nature of the route to be traversed, the type of cargo carried by the train, the weather conditions, the operation of the braking system of the train, or other factors impacting the performance of the braking system.
  • the present invention includes a method of providing train brake safety where the expected brake power of a train is determined and then compared to the actual brake power of a train as measured during operation of the train. If the actual power of the train is less than the expected brake power of the train by a safe brake threshold, thereby indicating an unsafe amount of available brake power, various responses may be taken. For example, the train may be automatically stopped or the brake pipe set pressure of the brake control system adjusted to compensate for the lack of actual brake power.
  • FIG. 1 a schematic of a system 10 for providing real-time train brake safety monitoring.
  • System 10 generally comprises a train control system 12, such as such as the LEADER(r) system available from New York Air Brake LLC of Watertown New York, that is positioned on-board a locomotive of a train and responsible for managing operations of a train.
  • Train control system 12 is further associated with several sources of data about a particular train and the route along which the train with travel, such as a train database 14 having a train manifest that includes information about the nature of weight of all rail cars in the train and the locomotives in the train consist.
  • Train control system 12 is further associated with a track database 16 having a track profile that contains the geographic routes to be taken by the train as well as the specification information about the route, such as the elevation changes, track curvature, etc.
  • Train control system 12 is also associated with various train sensors 18 that provide train control system 12 with operational information about the train, such as the train speed, brake pipe pressure, brake pipe pressure flow, and brake pipe pressure gradient.
  • Train control system 12 may also be associated with various environmental sensors 20 that provide information about external conditions, such as the temperature, weather conditions, etc.
  • Train control system 12 is programmed to include an expected brake power module 22 that calculates the expected brake power for a particular train.
  • the expected brake power reflects the total braking force that the train should be providing when all brakes on the train are effective and operating.
  • the expected brake power of the train may be determined in at least two ways.
  • expected brake power module 22 may calculate the expected brake power based on the amount of brake force each car in a train should produce. This determination may be made by calculating the net braking ratio of each freight car in the train.
  • a train made up of cars meeting both current and previous AAR requirements may have a minimum NBR of 8.5 percent if the all cars are loaded and a maximum NBR of 38 percent if all the cars are empty.
  • the coefficient of friction ( ⁇ ) between brake shoes and the wheels of a car can vary according to speed and temperature, but are generally available from the manufacturer of the brake shoes or regulatory compliance testing.
  • NBR is calculated at a brake cylinder (BC) pressure that represents full service (65 psi BC pressure)
  • the relationship for brake force can be further modified to account for an actual brake application as follows:
  • Brake Force NBR * BC Pressure / 65 psi * W train * ⁇
  • the calculation for brake force can be even more accurate represented as follows:
  • Brake Force NBR * BC Pressure ⁇ 3.5 / 65 ⁇ 3.5 * W * ⁇
  • the brake force may be expressed in terms of the BP pressure reduction as follows:
  • Brake Force NBR * BP Reduction * 2.5 ⁇ 3.5 / 65 ⁇ 3.5 * W * ⁇
  • expected brake power module 22 may calculate the expected brake power based upon the measured brake force of the train when braking system is in 100 percent working order. For example, the train may be subjected to one or more brake applications immediately after determining that the brakes are in working order, such as after a terminal test has been performed, so that expected brake power module 22 can calculate the actual braking power of the train.
  • N is the number of cars in the train
  • W is the weight of each car in the
  • a train is the measured deceleration rate of the train
  • G is the gravitational constant
  • Train Resistance is the total rolling resistance of the cars in the train
  • Force Grade is the force due to the track gradient
  • F curvature is the force due to curvature of the track.
  • F curvature K 2 / R c .
  • K 2 is a constant and R c is the radius of the curve. As with the other calculations, this could be performed for each car in the train and then summed to more accurately determine the forces over the length of the train.
  • Train control system 12 is further programmed to include an actual brake power module 24.
  • actual brake power module 24 uses data provided by, among other things, track database 16 and train sensors 18, actual brake power module 24 calculates the actual brake power of a particular train during a brake application.
  • Actual brake power module 24 is programmed to determine the braking power of the train at a particular point in time during its operation for subsequent comparison to the expected brake power determined by brake power module 24.
  • the actual brake power may be calculated by actual brake power module 24 based on the actual deceleration rate (rate of change of speed) of the train as a result of a particular brake application.
  • the data required by the various calculations may be gleaned from train database 14, track database 16, and sensors 18.
  • actual brake power module 24 provides measurement of actual brake power that can be more readily compared to the expected brake power regardless of the particular conditions in which the train is being operated.
  • Train control system 12 may further be programmed to include a safe brake threshold module 26 that calculates a safe brake threshold that represents the percentage difference between actual brake power during operation and the expected brake power that is acceptable in order to ensure safe for the operation of the train, e.g., the loss of brake power that is regarded as acceptable under applicable rules and regulations or the particular conditions of the route.
  • a safe brake threshold module 26 may include a default setting of 85 percent that represents the amount of loss of brake power that is acceptable under FRA regulations.
  • the default safe brake threshold set by safe brake threshold module 26 may be adjusted according to a number of modification factors to improve overall safety to account for various route, environmental, and brake system factors.
  • one modification factor may comprise the terrain over which the train will operate as expressed in track database 16 and determined by the location of the train, which is typically determined by global positioning satellite (GPS) systems. If the terrain and track are generally flat and tangent, then initial safe brake threshold is adjusted by multiplying by a safety factor of 1.0. If the terrain and track include long descending gradients and/or challenging curvature, the initial safe brake threshold may be multiplied by a predetermined safety factor that is higher than 1.0, such as 1.06, which would increase the initial safe brake threshold from the 85 percent minimum to 90 percent.
  • GPS global positioning satellite
  • the safe brake threshold may be modified according to single or multiple such factors so that a general freight train operating cross-country on a flat tangent track will have a less restrictive modified safe brake threshold than the modified safe brake threshold of a crude oil train operating in mountainous territory.
  • the safe brake threshold may further be modified by a seasonal factor to account to environmental conditions.
  • Optimal weather conditions such as those present in summer, may be assigned a multiple of 1.0 while wintry conditions assigned a multiple greater than 1.0.
  • the safe brake threshold may also be modified by an equipment factor that reflects the type of braking system safety features that are included in the braking system of the train. For example, a train that has wagons equipped with brake cylinder maintaining (BCM) could be assigned a safety factor of 1.0 while trains without such a feature would have a safety factor greater than 1.0.
  • BCM brake cylinder maintaining
  • the safe brake threshold may be further modified by a brake pipe (BP) leakage factor to account for BP leakage as determined from brake pipe pressure flow and gradient measurements available to system 10.
  • BP brake pipe
  • a train with more than a predetermined minimum amount of brake pipe flow in a "brakes released and fully recharged" state is likely experiencing an unacceptable amount of brake pipe and reservoir leakage and a train with more than a predetermined minimum amount of brake pipe flow in a "brakes applied" state is likely experiencing an unacceptable amount of brake pipe and brake cylinder leakage.
  • the flow in the "brakes applied” state is a measurement of the brake pipe and brake cylinder leakage as, in this state, the brake cylinder pressure is maintained to either the setting of the quick service limiting valve (QSLV), typically 10-12 psi for control valves that do not have BCM functionality or to the brake cylinder command pressure by control valves with BCM functionality.
  • QSLV quick service limiting valve
  • the replenishment air is provided by the brake pipe so that the amount of brake pipe flow allows for a calculation of the amount of leakage.
  • the train brake leakage can be estimated by calculating the brake pipe leakage flow at the recharge pressure, making a brake application, calculating the equivalent brake pipe leakage at the new lower brake pressure (head pressure is reduced, so leakage flow is reduced even though the leak size remains the same), measuring the actual brake pipe flow with the brakes set, and then subtracting the equivalent brake pipe leakage from the actual brake pipe flow with the brakes set.
  • the net resulting brake pipe flow can be inferred to be the result of brake cylinder leakage. In this calculation, the leakage contribution in the release and recharge state by the reservoirs is ignored, as it is typically small compared to the brake pipe leakage.
  • a BP leakage factor of 1.0 may be assigned for a brake pipe flow is less than a minimum of 15 CFM with a gradient of less than 5 psi. If the flow is greater than 15 CFM and the gradient is greater than 5 psi, however, then the BP leakage factor may be assigned a value greater than 1.0.
  • the BP leakage factor may be determined so that it proportionally increases with the ratio of flow in CFM divided by a predetermined threshold CFM (60 CFM under the FRA class 1/1A terminal test) and/or the gradient in psi divided by a predetermined threshold psi (such as 15 psi).
  • Modified SBT Initial SBT * terrain safety factor * city factor * cargo factor * seasonal factor * equipment factor * BP leakage factor .
  • the modified safe brake threshold can be set to a predetermined maximum value that is slightly less than 100 percent, such as 95 percent.
  • System 10 further comprises an actual brake efficiency module 28 that compares the expected brake power that was determined by expected brake power module 22 against the actual brake power of the train as determined by actual brake power module 24 during the operation of the train. Actual brake efficiency module 28 may then compare the difference between the expected brake power and the actual brake power to determine whether the braking efficiency of train is above the safe brake threshold of safe brake threshold module 26. Actual brake efficiency module 28 thus determines whether the actual brake power of the train has degraded to point where it has fallen below the current safe brake threshold.
  • System 10 may further includes a response module 30 that is programmed to provide information about the actual brake efficiency of the train or to take certain action(s) depending whether the train is operating in a manner that fails to meet the safe brake threshold set by safe brake threshold module 26.
  • response module 30 can interact with a display module 32 to provide a real-time output of the actual brake power to the train operator using the conventional operator display associated with train control system 12 so that the operator is alerted when the safe brake threshold is not being met.
  • Response module 30 can also be programmed to interact with a report module 34 that generates a report or recording of events related to the actual brake power and its relationship to expected brake power.
  • system 10 may also take affirmative action in response to a determination that the train has fallen below the safe brake threshold.
  • Response module 30 may be associated with a shut down module 36 that slows down or even stops the train when the actual brake power has dropped below the safe brake threshold as may be required by some governmental regulations.
  • Response module 30 may further be programmed to cooperate with a brake adjustment module 38 to adjust the actual braking power of the train, such as by changing the brake pipe pressure of the braking system to increase the brake power of the train such that the actual brake power of the train exceeds the applicable safe brake threshold.
  • system 10 can optionally receive hot/cold wheel data from wayside detectors 40.
  • Wayside detectors 40 are stationary non-contacting thermal measurement systems that measure the wheel temperatures on each car of the train as it passes the wayside detector. Wayside detectors are generally located at the bottom of a grade and measure the relative brake effectiveness on each car by the wheel temperatures on that car compared to wheel temperatures on the other cars in that same train. Wheels with temperatures which are outside statistical norms are flagged and the corresponding car number is determined from an RFID tag on that car.
  • a car with an overly hot wheel may have a stuck brake or a hand brake in the "on" position, while a car with an overly cold wheel may have a failed brake.
  • Wheel temperature data may be transmitted wirelessly to system 10 or routed from wayside detector 40 to a central server and then to system 10. The resulting measurement of wheel temperatures provides direct feedback of the brake status on each car and may be correlated to the measured train brake power. While indication of a cold wheel might not result in a fault action by response module 30 if the actual brake power satisfies the safe brake threshold, the train may nevertheless be stopped so that the crew can service or disengage the faulty brake. Alternatively, wheel temperatures could be provided to system 10 via onboard sensors.
  • system 10 may implement a train brake safety monitoring process 50.
  • the first step 52 in process 50 is to establish that the braking system is functioning properly, such by performing the terminal test required by FRA.
  • a train that passes the initial test is presumed to have one hundred percent functional brakes and thus can provide a baseline expected brake power for system 10.
  • the next step 54 is to obtain the specific train data information from train database 14, including the number of locomotives and number of cars in the train. Once the train data has been provided, system 10 can calculate the maximum expected brake power 56 that is theoretically possible with 100 percent operable brakes.
  • a safe brake threshold may then be set 58, such as 85 percent (or a greater percentage as may be desired or required) of the calculated maximum expected brake power 56.
  • system 10 may correlate the actual train brake power to the expected train brake power to establish a baseline actual brake efficiency 60. This step could be repeated for a predefined number of brake applications, for example three sequential brake applications, and then averaged to more accurately establish baseline actual brake efficiency 60. If a comparison against the safe brake threshold 62 at this point reveals that the baseline actual brake efficiency 60 fails to satisfy safe brake threshold 58, the braking system is not operating as required and system 10 can notify the operator 64 that an inspection is required or provide railroad operations with a status report using radio or other conventional telemetry advising that the train must be routed to a siding as the braking system is not working at 100 percent efficiency.
  • process 50 continues to monitor braking performance by calculating the actual brake power at each subsequent brake application 66.
  • the ongoing actual brake power calculation 66 is thus determined in real-time during the course of operation of the train and may be continuously compared against the baseline brake efficiency 60 to determine whether the actual brake power satisfies the safe brake threshold 58.
  • System 10 may optionally display the current actual brake efficiency to the train driver and update that value after each brake application. If the actual brake efficiency falls below the safe brake threshold, system 10 can take the appropriate action as explained above, such initiating a non-suppressible, full service penalty brake to bring the train to a full stop as required by the FRA if the train braking system is determined to be less than 85 percent.
  • system 10 may make a recommendation to the train driver to compensate for diminished brake power. For example, if the current actual brake power is determined to be 90 percent of the expected power or initial baseline, system 10 can recommend a brake application level that is higher than would otherwise be ordered by driver to compensate for the missing brake power, thereby improving braking performance.
  • system 10 can adjust the percent operable brake to show the lesser of either that measured by means of the total current brake power, or that calculated based on the number of cars with cold wheels. Furthermore, the system may update the driver display to show the current actual brake power minus an appropriate reduction in brake power due to the number of cold wheels indicating that particular brakes are not functioning and thus not contributing to actual brake power.
  • system 10 can execute one or more actions to improve the safety of the train. For example, a speed reduction for the train may be implemented through display module 32.
  • Conventional train control systems 12 are provided with track speed limits via track database 16 and then display the current speed limit to the driver based on a GPS determination of the actual location of the train along the track in track database 16.
  • Track signal spacings are defined by the limiting speed limit and an assumption that the train has at least 85 percent operable brakes.
  • the total kinetic energy of the train is proportional to 1/2 MV 2 and that kinetic energy is converted to thermal energy during braking.
  • the remaining brakes When less than 100 percent of the brakes are operable, the remaining brakes must therefore brake the mass of the un-braked cars and dissipate the energy of the un-braked cars.
  • the operating speed of the train may be reduced to increase train safety by setting the speed reduction to the speed at which the train will still be able to stop within the set signal spacing even with less than 100 percent operable brakes.
  • the speed reduction will reduce the wheel temperatures of the remaining operable brakes and help avoid problems associated with over temperature wheels.
  • FIG. 3 another response that may be directed by system 10 is to dynamically increase the brake pipe set pressure of the braking system according to a brake pipe set pressure adjustment process 80.
  • actual train brake power will increase in response to an increase in the brake pipe set pressure, actual brake power may be increased relative to the baseline brake power.
  • a check 82 is performed to determine whether the train is in a safe brake system initial condition.
  • a safe brake system initial condition may comprise the brakes being in the applied condition or in a fully released and recharged condition.
  • the brake system condition may be determined from brake state feedback provided from computer controlled brake (CCB) system of the lead locomotive, the measured head-end brake pipe pressure, the brake pipe flow on the lead locomotive, the brake pipe pressure on the last car as measured by an End-of-Train (EOT) device, and the brake pipe gradient on the train.
  • a check 86 must also be performed of the track profile in track database 16 and the current location of the train, typically determined by GPS, to determine that there is sufficient time to recharge the brakes to a higher level before another brake application will be needed along the route.
  • system 10 may determine the appropriate brake pipe pressure increase that is appropriate to compensate for the calculated loss in brake power 88.
  • the amount of increase may be established by default and simply retrieved from memory or an internal setting. Alternatively, the amount of increase may be calculated to compensate for the particular loss of brake power.
  • a command 90 may be sent to the CCB 84 to increase the brake pipe set pressure.
  • the appropriate change could be displayed for the operator to make the adjustment manually.
  • the brake pipe will recharge to the new higher level. If the brakes are currently in the fully released and recharged state, the brake pipe pressure may be increased and the train brakes recharge to that new level.
  • system 10 can inhibit the reduction of the brake pipe set point until after an emergency brake application.
  • System 10 may optionally improve the measurement of brake cylinder leakage for brake applications of long duration by monitoring the increase of brake pipe flow with time.
  • the QSLV On trains with cars not equipped with BCM functionality, the QSLV only maintains the brake pressure to the QSLV setting of about 8 to 12 psi.
  • brake leakage resulting in increased brake pipe flow may only be detected after the brakes have been applied for a sufficient length of time so that the brake cylinder has time to leak down to the QSLV setting. For example, a 10 psi brake pipe reduction would nominally result in a 25 psi brake cylinder pressure.
  • System 10 may be programmed to calculate, store, and display to the driver a measurement of the average brake cylinder leakage determined as discussed above. System 10 may further display both the current leakage as well as the highest amount of leakage experienced during a trip. The highest amount of leakage stored in memory may be updated to a greater or lesser value whenever the normalized measurement conditions are the same as or longer than the conditions which resulted in the stored value when those conditions include the initial brake cylinder pressure and the duration of the brake set.
  • a 15 psi brake pipe application should result in a brake cylinder pressure of approximately 37 psi, which will leak to a 10 psi QSLV in 27 minutes if the brake cylinder is leaking at a rate of a 1 psi/min rate, while a 10 psi brake application will result in a 25 psi brake cylinder pressure that will leak to a 10 psi QSLV in 15 minute at the same leakage rate.
  • the relationship between brake pipe reduction and brake cylinder pressure is known and is approximately 1.0 to 2.5, the time to reach the QSLV setting is dependent on the starting brake cylinder pressure and the leak rate.

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Regulating Braking Force (AREA)
  • Train Traffic Observation, Control, And Security (AREA)

Claims (15)

  1. Système de sécurité de freinage de train, comprenant :
    un premier module (24) programmé pour calculer la puissance de freinage réelle affichée par un train lors d'un fonctionnement du train ; et
    un deuxième module (28) programmé pour déterminer si la puissance de freinage réelle affichée par le train est tombée en-dessous d'un seuil de puissance de freinage sûr.
  2. Système selon la revendication 1, comprenant en outre un troisième module (30) programmé pour prendre une mesure en réponse à la puissance de freinage réelle tombant en-dessous du seuil de puissance de freinage sûr.
  3. Système selon la revendication 2, dans lequel le troisième module (30) est programmé pour stopper le train en réponse à la puissance de freinage réelle tombant en-dessous du seuil de puissance de freinage sûr.
  4. Système selon la revendication 2, dans lequel le troisième module (30) est programmé pour envoyer une commande à un système de commande de freinage ayant une pression fixée de conduite de freinage pour causer une augmentation de la pression fixée de conduite de freinage d'une quantité prédéterminée en réponse à la puissance de freinage réelle tombant en-dessous du seuil de puissance de freinage sûr.
  5. Système selon la revendication 4, dans lequel le troisième module (30) est programmé pour calculer la quantité prédéterminée d'augmentation de la pression fixée de conduite de freinage sur la base de la différence entre la puissance de freinage réelle du train et le seuil de puissance de freinage sûr.
  6. Système selon la revendication 1, dans lequel le seuil de freinage sûr comprend un pourcentage d'une puissance de freinage attendue pour le train.
  7. Système selon la revendication 6, dans lequel le seuil de freinage sûr est ajusté en fonction d'au moins un facteur d'ajustement.
  8. Système selon la revendication 7, dans lequel le facteur d'ajustement est au moins un facteur choisi parmi le groupe consistant en le terrain particulier de l'itinéraire devant être emprunté par le train, la nature géographique de l'itinéraire devant être emprunté, le type de fret transporté par le train, les conditions météorologiques, et le fonctionnement du système de freinage du train.
  9. Système selon la revendication 6, dans lequel la puissance de freinage attendue pour le train est déterminée sur la base d'un calcul d'une quantité théorique de puissance de freinage qui peut être appliquée par le train.
  10. Système selon la revendication 7, dans lequel la puissance de freinage attendue pour le train est déterminée sur la base d'une quantité réelle de puissance de freinage appliquée par le train lors d'un essai.
  11. Procédé pour assurer la sûreté de freinage de train, comprenant les étapes de :
    détermination (56) de la puissance de freinage attendue d'un train ;
    comparaison (66, 68) de la puissance de freinage réelle d'un train lors d'un fonctionnement du train à la puissance de freinage attendue d'un train ; et
    initiation (70) d'une réponse indiquant une quantité non sûre de puissance de freinage disponible si la puissance réelle du train est inférieure à la puissance de freinage attendue du train d'un seuil de freinage sûr.
  12. Procédé selon la revendication 11, dans lequel la réponse comprend l'envoi (90) d'une commande à un système de commande de freinage ayant une pression fixée de conduite de freinage pour causer une augmentation de la pression fixée de conduite de freinage d'une quantité prédéterminée en réponse à la puissance de freinage réelle tombant en-dessous du seuil de puissance de freinage sûr.
  13. Procédé selon la revendication 12, dans lequel la quantité prédéterminée d'augmentation de la pression fixée de conduite de freinage est calculée sur la base de la différence entre la puissance de freinage réelle du train et le seuil de puissance de freinage sûr.
  14. Procédé selon la revendication 11, dans lequel le seuil de freinage sûr comprend un pourcentage de la puissance de freinage attendue pour le train qui est ajustée en fonction d'au moins un facteur d'ajustement.
  15. Procédé selon la revendication 14, dans lequel le facteur d'ajustement est au moins un facteur choisi parmi le groupe consistant en le terrain particulier de l'itinéraire devant être emprunté par le train, la nature géographique de l'itinéraire devant être emprunté, le type de fret transporté par le train, les conditions météorologiques, et le fonctionnement du système de freinage du train.
EP15721969.2A 2015-04-29 2015-04-29 Système de contrôle et action d'émergence pour un frein de véhicule ferroviaire Active EP3288806B1 (fr)

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PCT/US2015/028230 WO2016175787A1 (fr) 2015-04-29 2015-04-29 Système de surveillance de sécurité de freinage de train et d'action en cas de panne

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SE542825C2 (en) 2018-04-26 2020-07-14 Scania Cv Ab A method for controlling a motor vehicle
CN109435936B (zh) * 2018-12-06 2023-08-04 眉山中车制动科技股份有限公司 一种双通道数据传输列车制动监测系统
CN110293949B (zh) * 2019-06-06 2021-09-24 山东科技大学 一种高速列车空气制动系统微小故障检测方法
CN112141069B (zh) * 2020-09-10 2022-06-28 中车长春轨道客车股份有限公司 一种动车组用制动及供风系统的健康管理系统

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JPS5854830A (ja) * 1981-09-29 1983-03-31 日産自動車株式会社 車両用電子回路の電源監視装置
US5744707A (en) * 1996-02-15 1998-04-28 Westinghouse Air Brake Company Train brake performance monitor
US6839664B1 (en) * 2000-06-09 2005-01-04 Wabtec Holding Corporation Electrically controlled pneumatic end of train pneumatic emulation system
DE10357764A1 (de) * 2003-07-28 2005-03-10 Wabco Gmbh & Co Ohg Verfahren und Vorrichtung zum Erkennen eines Defektes oder Ausfalls eines Druckluftverbraucherkreises in einer elektronischen Druckluftanlage für Fahrzeuge
DE102008028264B3 (de) * 2008-06-13 2009-12-17 Knorr-Bremse Systeme für Schienenfahrzeuge GmbH Verfahren zur Überwachung wenigstens eines das Betriebsverhalten von Fahrzeugen oder Fahrzeugzügen beeinflussenden Systemparameters
AU2014200345B2 (en) * 2013-05-17 2019-09-26 Wabtec Holding Corp. Braking Systems And Methods For Determining Dynamic Braking Data For A Braking Model For A Train

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
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BR112017021182B1 (pt) 2022-07-26
BR112017021182A2 (pt) 2018-07-03
WO2016175787A1 (fr) 2016-11-03
CA2984423C (fr) 2018-03-06
EP3288806A1 (fr) 2018-03-07
CA2984423A1 (fr) 2016-11-03
AU2015392953A1 (en) 2017-11-09
CN107635838A (zh) 2018-01-26
AU2015392953B2 (en) 2018-02-22
CN107635838B (zh) 2020-05-19

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